Tension device for warp-beams.



Farmen oct. 29, mm.

H 2.2# DD ,g. 14nd C. A. H. RIETSCH. TENSION DEVICE 'FOB WARP BEANIS.

(Application ldAFe'b. 19, 1901.)

(No Model.)

l.is

UNITED 'STATES CARL A. H. RIETSOH,

PATENT OFFICE.

OF NEW YORK, N. Y.

TENSION DYEVICE FOR WARPf-BEAMS.

SPEClFICA'llON' forming part of Letters Patent No. 68 5,643, dated October 29, 1901.

Application led February 19, 1901. Serial No. 47,979. (No model.)

T0 @ZZ whom it may concern:

Be it known that I, CARL A. H. RIETscH, a citizen of the United States, residing in New York, borough of Manhattan, in the' State of l New York,have invented certain new and useful Improvements in Tension Devices for Warp-Beams,of which the followin gis a specification.

This invention relates to certain improve-4 ments in tension devices for thewarp-beams of looms for holding the warp-threads for weaving always at a uniform degree of tension as they are fed forward, as required dur` of the'shifting stop; and the invention con sists, further, of` certain details of constructi'on and combinations of parts, which will be fully described hereinafter and linall y pointed out in the claims.

In the accompanying drawings, Figure l represents a front elevationof a warp'beam, showing two tension devices applied tothe same. Fig. 2 is a vertical section on line 2 2, Fig. 1. Fig. 3 is a vertical sect-ion on line 3 3, Fig. l, drawn on a larger scale. Fig. 4 is a section on line 4,4, Fig. 3; and Fig. 5 is a perspective view of the shifting stop on the tension-drum shown as detached therefrom.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A represents the body of the warp-beam on which the warpthreads are wound. The warp-beam, with the threads W thereon, is supported by its square shaft A in suitable hangers a a from a transverse piece F of the loom-frame. When wide goods are woven, two tension devices vare used, which are placed upon the shaft A at the portions a o. of the same at'each end of the beam-body A, so as to rotate therewith. Collars ft2 a retain the tension devices in position. When, however, narrow fabrics are woven, such as ribbons, one tension device is sufficient for each ribbon.

Each tension device consists of a dcylindrical drum, preferably formed in two sections B B. One section, B, is provided with `a number of sockets l) for receiving the coiled circumferential rims b' b2, between which is arranged on the periphery of the drum a shifting stop E, the base portion c of which has the same curvature as said periphery and is of a width equal to the distance between thecircumferential rims b b2. From the base e is bent up at one end a luge', while from4 the opposite end is bent up a hook e2. To the hooke2 is applied at its middle a tensioncord- G, which passes upon and twice around the circumferenceof each section B and B' and over the shifting stop, the lower ends of the cord G being connected by a transverse bar g, to which a tension-weight G is hung. i Ap- The drum sections are. l preferably provided at their outer edges with ,y

plied to the supporting cross-piece F of =the loom or otherwise supported stationarily in the path of the stop'E is a stop-plate E', which is vertically adjustable on itsl support by means of bolts or otherwise.

against it by the successive radial tension` springs D. The lower part of the stop-plate Said stop-plate retains the stop E as the same yis pressed E' is recessed, as shown, so as to permit the passage of the outer ends of the tensionsprings.

From the foregoing the operation of the tension device will be readily understood.

The shifting stop E slides over the surface of the drum C by the tension of the weighted cord pulling it, while the beam slowly rotates in the opposite direction by reason of the pull of the warp-threads, which pass inthe usual Ioo manner from the beam A through the reed f of the batten to the cloth-beam. During the gradual turning of the warp-beam the strain on the shifting stop E is taken up by the tension-springs D, which act successively on the stop. As the warp-beam is moved in the direction of the arrow in Fig. 3 one of the tension-springs D, acting on the stop, holds it in contact with the stop-plate E', the spring being gradually bent over into the position indicated in dotted lines in Fig. 3 by the turning of the beam and the counter-tension exerted by the weighted cord until the outer end of the spring passes below the base e and moves along the same until liberated when arriving at the lower edge of the front lug e', whence it will immediately return into its normal position against the pin CZ. Its return is cushioned by the felt coveringrl' of the pin and by the free outer end 193 of the spring. The two sections of the tension device are maintained in position, so that the pins d of one section are always in contact with the opposite section and prevent the springs from snapping past the pins by means of the collars a2 a2. As soon as the end of one tensionspring passes below the base e of the stop E` and snaps from the same the rear part of the base is engaged by the neXt following tensionspring D, which is gradually moved back in the same manner, and so on, one after another, with the result that while the warpbeam is turned on its axis the warp-threads are always kept at the proper degree of tension by the action of the tension-springs on the shifting stop E and the maintaining of the same in its proper relative position in the tension drum by the action of the stopplate E.

The advantages of my improved tension device for warp-beams are, first, that a uniform tension is exerted on the warp-threads, so that the even weaving of the fabric can take place; second, that throughout the turn ing motion of the warp-beam a continuous tension is exerted by the friction or tension springs on the warp-beam, and, lastly, that by the detaching and replacing of the tension-springs on the beam a new beam, with a new supply of warp-threads, can readily be inserted at any time into the loom.

Having thus described my invention, I claim as new and desire to secure by Letters Patent'- 1. A tension device for warp-beams, which comprises a tension-drum rotating with the beam, radial tension-springs secured to said drum, ashifting stop on said drum in the path of the springs, a weighted tension-cord extending over the peripheryof the drum and secured to said shifting stop, and a stationary stop-plate located in the path of the shitting stop, substantially as set forth.

2. A tension device for warp-beams,consisting of a drum divided into two sections, tension-springs secured to the drum and eXtending radially between the sections, a shifting stop guided on the periphery of the drum in the path of the springs, a weighted tensioncord wound on the drum and attached to said shifting stop, and a stop-plate attached to the frame of the loom in the path of the shifting stop, substantially as set forth.

3. The combination, with a warpbeam,pro vided with a cylindrical portion or body for the warp-threads, and a shaft provided with squared portions and round outer ends, of a tension device consisting of a drum iitting on the outer ends of the beam-shaft and composed of two sections, radial springs secured to the drum and extending in the space bei tween the sections to the outside of the drum, stop-pins for said springs, a shifting stop, the base of which slides on the circumference of the drum, "a weighted tension cord wound around the drum and attached to one end of the base of the stop, an outwardly-projecting lug at the other end of the stop, and a stop plate attached to the frame of the loom and adapted to retain the shifting stop but permit the passage of the projecting ends of the tension-springs, substantially as set forth.

4. In a tension device for warp-beams, a cylindrical drum, a tension-cord on said drum, a shifting stop formed of a plate curved to correspond to the curvature of said drum, said plate being provided at one end with an up wardly-extending stop-lug, at the opposite end with a bent-up hook for the tension-cord, and at each side of said lug and hook with curved portions adapted to receive said tension-cord, lsubstantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

CARL A. H. RIETSOI-L Witnesses: I

PAUL GOEPEL, JOSEPH H. NILES.

IOO 

